wanting to make a death game comic

Wanted to make a death game comic, decided today would be the day I would start making it and adding ocs and stuff, but when I had everything planned out and I was about to post the oc requirements and stuff, I saw someone else is already doing something similar to that and had actually started making it, I don't know if I should continue going forward with this idea right away or wait until they are done with their comic, because I dont want to overshadow their comic or seem like I'm copying their idea when I've had this idea for 2 weeks now, I just don't know, should I go forward with it?

Incase your wondering, there is gonna be 60 characters/ocs in this comic, i just need 44 more ocs to add.